Improvement in bobbin-winders for sewing-machines



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N. PETERS. FNOTO-U'TNDGRAFHER, WASHINGTON. D. C.

WILLIAM MILLER, OF BOSTON, ASSIGNOR TO HIMSELF AND AUGUSTUS SEAVER, OF MILFORD, MASSACHUSETTS.

IMPROVEMENT IN BOBBlN-WINDERS FOR SEWIRIG-MACHINES.

Specification forming part of Letters Patent No. 167,11 1, dated August 24, 1875; application filed J unc 8, 1875.

Massachusetts, have invented certain Improvements in Bobbin-Winders for Sewing-Machines, of which the following is a specification In the accompanying drawings forming part of this specification, Figure 1 is a front elevation of my invention. Fig. 2 is a top-plan view, and Fig. 3 a side view, of the thread-guide.

This invention relates to certain new and useful improvements in bobbin-windin g attachments for sewin g-machines, of the classin which a bobbin-feed or thread-guide is carried back and forth by the side of a revolving bobbin in such manner as to automatically present the thread to the bobbin from end to end.

My invention has for its object, first, to provide simple and efi'ective means for varying the speed of the reciprocating thread-guide to accommodate it to thread, silk, 8270., of varying sizes or numbers, so that thread or silk of one size shall be as evenly and compactly wound as another. It also has for its object to adjust the bobbin-feeding mechanism so as to permit the feeding of bobbins of varying lengths and diameters. To these ends my invention consists, first, in providing a bobbinwinding attachment, of the class above'named, with a system of differential pulleys arranged between the prime motor and the mechanism that reciprocates the thread-guide, in such manher as to enable the speed of the thread-guide to be increased or diminished according to the size of the thread being wound, thereby insuring the even and compact winding of different sizes of thread. It consists, secondly, in the provision of means for varying the longitudinal motion of the bobbin-feed or thread-guide,

' so as to accommodate it to bobbins of varying lengths; and it consists, thirdly, in providing the bobbin-feed with a joint and spring, whereby the guide is enabled to bear at all times upon the periphery of the bobbin, whether wound or unwound, without binding, all-of which I will now proceed to describe.

Inthe drawings, A represents the frame of a bobbin-winding attachment, having suitable hangers a b and attaching-arm O, and provided with a gear-wheel, B, having on its face a heart-shaped or other cam, G, as in other devices of this class. D E are uprights, in which is journaled an arbor, F, having a worm-gear, G, which meshes with and operates the gearwheel, B. J represents a series of differential pulleys connected with the arbor F, and connected-by a belt, H, with a series of differential pulleys, K, on an arbor, L, which is journaled in the ends or boxes of a yoke or frame, M, the latter being suitably attached to the lower portion of the frame A. The arbor L carries a series of differential pulleys, U, on its outer end, which are belted to a seriesof differential driving-pulleys,-V, located on the driving-shaft O, which is provided with the usual friction-wheel P, which engages with the operating-wheel of the sewing-machine. The shaft 0 is journaled in the frame A, and is provided at one end with the usual socket to receive the end of the bobbin 6?, the other end of the bobbin being supported in an adjustable spring-stem, e, which is provided with a suitable thumb-knob, e, and allows the ready admission or removal of the bobbin, as heretofore. From the inner end of the frame A c2:- tends upward a curved arm, Q, finished with a flattened end or plate, which receives a screw, f, which holds a slotted plate, g. To

the plate g is pivoted a connecting-bar or 1ever, R, formed with a slot, 71., that receives a stud or pin, t, projecting from a sliding bar or rod, k, which reciprocates horizontally in a plane passing through the center of the gearwheel B in bearings l m on the side of the frame A, the other end of the bar or rod 7c engaging with the periphery of the cam O. From the hangers a b project bearings l m, which support a sliding guide bar or rod, S, provided near its end with a stud or pin, a, by which it is connected with the bar or lever B through a slot, 1), formed in the lower portion of said lever, to whose upper portion is attached one end of a spring, r, the other end of which is attached to the frame A, so as to secure the proper tension on the bar 70 and keep it in yielding contact with the cam G. On the guide rod or bar S is located in such manner as to be adjustable longitudinally, a thread-guide, T, having an eye, it, through which the thread or silk passes to the bobbin,.and grooved on the end to properly guide the thread. The guide is provided at the rear with a thumbscrew to hold or release the guide and allow of its adjustment on the rod. Instead of making the guide T in one piece, as heretofore, I make it in two parts, 19-h, the body or rearportion 19 being jointed. tothe front or'movable portion, the top of which is formed to hold one end of a notched spring, 8, which is con nected at the other end-with the rear 'portion'p;

Any other spring arrangement may be used, if preferred, for keeping the forward end of the guide in yielding'contactwith thebobbin manner to be conveniently attached to sewingor the thread thereon, the guide being thus allowed to rise and fall as the material is wound or unwound on or from the spool or bobbin without binding, or otherwise affecting the perfectoperation-of the thread-guide.

applied to a sewing-machine and. the bobbin placed between the sprin g-stem e and the socket of theshaft O, on the application-of power the bobbin is revolved by theshaft O, and the gearwheel B is revolved through the Worm G and pulleys J K. U V. The rotation of thewheel B and-its cam O produce the reciprocating motion ofv the thread-guide T, through the bar is, connecting bar or lever R, and bar S, the bars-k Ssliding in their bearings, and. 7c beingcaused by the spring rto follow the eccentric periphery of the cam O as it revolves. The guide is thuszcaused to reciprocate in a pathparallel with the bobbin, delivering the thread to the latter from end to end.

When the coarsest thread is being wound throw or stroke; ofithe thread-guide T is adjusted, the throw being lengthened when the fulcrum is raised and the lever lengthened between its fulcrum and the bar k, and vice versa. By this means the guide T is enabled to feed bobbins of difi'erent lengths.

The frame Amay beshaped in any desired machines of difierent construction, and the attachment may be applied to a sewing-machine by means of a screw. through the-connecting- 1 arm G, as heretofore, or by any suitable-means. It will be seen that'when theatt'achment is 1 I claim as my invention- 1.. In; a sewing-machine bobbin-winding; attachment, the combination of the drivin g-shaft 0,.having the friction-wheel P. and differential pulleys V, the intermediate arbor L,.having. two-sets of diiferential pulleys, K. U, the arbor F, having the differential. pulleys J and wormvgear. Gr,.and the gear-wheel'- B having the cam-G, all located in-a suitable frame, connected and-arranged as set forth, and adapted to rotate thecam G at different rates-of. speed, substantiallyas and for the purpose specified.

2., The reciprocating thread-guide T, incombination with thesliding bars S k, connecting bar or lever B, spring-r, fulcrum-plate g, and

, cam O, substantially. as and for the purpose specified.

3. The thread-guide T, composed; of the twopartsp h, jointed or hinged together and provided with thespring-s-and eye t, substantiallyv as and. for the purpose specified.

In testimony whereof I have signed my name to this specification inrthepresence-of two'subscribin g witnesses.

WILLIAM MILLER- Witnesses SAML. M. BARTON,. (LE. BROWN. 

